Wood-sawing machine



. 3 Sheets-Sheet 1.

(No Model.)

W. D. HOPKINS. WOOD SAWING MACHINE.

Patented Feb. 28, 1893,

v.NO. 492,746.

Witnesses.

2 t e e h S S u 6 e h S 3 D d M d O M o m WOOD SAWING MACHINE.

Patented Feb. 28, 1893.

Witnesses.

(No Model.)

3 Sheets-Sheet- 3. W. D. HOPKINS. WOOD SAWING MACHINE.-

No. 492,746. Patented Feb. 28, 1893.

Witnesses.

6 (if/W41.

You, a. c.

7 UNITED STATES PAT NT OFF QE.

VILLIAM D. HOPKINS, OF GOFFSTOWN, ASSIGNOR OF ONE-HALF TO HENRY WV.HOPKINS, OF WILTON, NEW HAMPSHIRE.

WOOD-SAWIZING MACHINE.

SPECIFICATION forming part of Letters Patent No. 492,746, dated February28, 1893.

Application filed August 6, 1891.

T0 a ZZ whom it may concern:

Be it known that I, WILLIAM D. HOPKINS, a citizen of the United States,residing at, Goifstown, in the county of Hillsborough and State of NewHampshire, have invented a certain new and useful Improvement in VVood-Sawing Machines, of which the following is a specification.

My invention relates to wood sawing machines of the class adapted to sawa log or stick transversely into blocks and is particularly adapted forsawing logs or sticks into blocks to be converted partly bychemicalmeans into wood-pulp for paper.

In the accompanying drawings, on three sheets, Figure 1 is a plan of awood-sawing machine constructed in accordance with my.- invention; Fig.2, aside elevation of a part of the carriage, one of the racks by whichthe carriage is prevented from moving backward, the dog which engagessaid rack and a transverse section of the dog-releasing shaft andfeed-bar; Fig. 3, a plan of a part of the carriage, omitting thelog-holding troughs; Fig.

4, a side elevation of the devices which set over the stock for a newcut and the devices which disengage the feed-racks and the feedbar; Fig.5, a rear elevation of the machine, omitting the upper parts of theband-saws, their upper pulleys, a part of the track-sup porting railsand a part of one of the double inclines; Fig. 6, a side elevation ofthe dogpost and dogs; Fig. 7, a horizontal section onthe line 7 7 inFig. 6; Fig. 8, a front elevation of said dog-post and dogs; Fig. 9, aplan of the same; Fig. 10, a left end elevation of the machine; Fig. 11,a plan of the reversing-arms and their eccentric; Fig. 12, a rearelevation of said reversing-arms, their eccentric, a part of the slidingjournal-box which supports the shafts of the friction wheels and thebrackets between which said eccentric revolves.

Upon the fioor or other surface A rest parallel stringers orlongitudinal supporting timbers B B, on which are secured, by screws 0c, rails O 0, represented as having longitudinal ways or raised Vs 0 0on which run the grooved supporting-wheels d d of the carriage D. Thecarriage D is a rectangular frame, the front rail (1 and back rail d of.which are parallel with the track-rails C G erial No. 401,851. (Nomodel.)

and have hangers d 02 secured to their under sides, in which hangers areJournaled the supporting-wheels d cl in a well known carry at theirfront endsfriction-wheels f f fast on-said shafts and lying in the samevertical planes with said friction-drum. The front journal-boxes f f ofsaid shafts'are secured on a slide f, said slide having longitudinalslotsf fi, through which boltsf f are passed, I

to hold said slide down to its supporting-surface while allowing alongitudinal movement of said slide sufficient to bring either of thefriction-wheels f f into contact with said friction-drum and, tofacilitate the longitudinal movement of the slide, the rear journalboxesff'.rnay turn slightly upon vertical pivot-bolts f f. Another shaft F issupported in journal-boxes f f between the shafts F F, and is providedwith a fast pul- 8o ley f connected by a suitable belt, not shown, toany motor. The shaft F is provided with speed-cones f f, connected bybelts f f 18 to other speed-cones f f fast on the shafts F Frespectively, said speed-cones 8 being used for the obvious purpose ofchanging the speed of theshafts F F, the belt f" being a crossedbelt andthe belt-f being an open belt, to drive the friction-wheels fif inopposite directions and to reverse the movement of the friction-drum eand thereby reverse the direction in which the carriage moves as saidfriction-wheels are alternately brought into contact with saidfriction-drum, the shaft F having a constant rotation in the 5 samedirection.

A reversing-shaft G is supported in a journal-box g and is provided withan eccentric 9', fast thereon and arranged between two brackets g 9rigidly secured on the slide f [00 in contact with said eccentric, sothat a partial revolution of said reversing-shaft G will give alongitudinal movement of said slide sufficient to bring one of thefriction-wheels f f against the friction-drum e and carry the other ofsaid friction-Wheels out of such contact.

Upon the reversing shaft G are secured in different planes and at angleswith each other, two arms g g and to the carriage D are rigidly securedtwo laterally-extending arms at d each provided with a down-hanging stud(1 61 one d of said studs being in the same vertical plane in which thearm g swings and the other d of said studs being in the vertical planein which the other arm g swings, that is, the stud d or d which follows(when the carriage is moving in either direction) strikes the arm 9 or glast reached by said following stud. The arms 9 g are provided withweights g g which cause said arms to complete their movement (in thedirection to which. their combined center of gravity is thrown by theaction of either of the studs (1 d), the movement of said arms beinglimited by the striking of the friction wheelsf f against thefriction-drum 6 g g are at rest, one of said arms g is in a vertical ornearly vertical position and the other is inclined, as shown in Figs. 5,11 and 12, and the friction-wheel (f orf) on the same side of thereversing shaft G with such inclined arm is in contact'with thefrictiondrum 9 The end-rails d d of the carriage D are.

provided with horizontal slots (Z (Z in which slides a horizontalfeed-bar H. Other transverse rails d d, as many as may be desired,precisely like the end rails d d and parallel with said end-rails aresecured like said endrails to the back-rail d and front-rail 61*".

To the feed-bar H in each interval between an end-rail and the adjacenttransverse rail is secured a vertical dog-post h, see Figs. 6 to 9, thelower part of said post it having a vertical slot h and the upper partof said post having a hole 71 which is in the same line withsaidvertical slot. In the hole h turns the vertical screw h the lowerportion of which passes through a screw-threaded hole h (shown in dottedlines in Fig. 6), in the shank of the lower dog 71 so that by turningthe crank or handle 77. of said screw the lower dog is raised orlowered, said screw having a collar it, fast thereon, which rests uponthe top of the post and prevents a downward movement of said screw. Whenthe lower dog is in its proper position, the screw 77. is prevented fromturning by a fork or holder h pivoted on an arm h or bracket, secured tothe post h, said fork engaging an enlarged end h of thecrank 77. therebypreventing not only the lower dog from movement but also holding thecrank parallel with the frontrail 01 of the carriage D and out of thereach of the saws M M, hereinafter referred to.

On each transverse rail, including the endrails, is supported one halfor inclined side 2' 1; of a trough I, there. being as many such When thearms troughs as there are dog-posts and the sides of. said troughsflaring upwardly, as shown in Fig. 5. In each troughlisplaced,transversely of the carriage D, a log I, after squaring the endsof the log, the rear end of the log being arranged above the dog hAnother dog h surrounds the reduced upper part of thepost 71, said upperpart of said post being, as shown in Fig. 7, thicker from front to backthan laterally and passing upward through a hole in said upper dog, saidhole 71. being slightly larger than the part of the post 71 which itsurrounds to allow said dog to be raised upon said post to admit the endof the log and the sides of said hole engaging said post and preventingthe rising of said dog on said post when the front end of said dog israised. The upper dog is substantially like the lower dog 71 except asabove stated, and except also that it is provided with a handle toenable said dog to be raised and lowered quickly and conveniently. Thelog being placed in the trough I, when the lower .dog h is in its lowestposition, the upper dog is lowered against the top of the log and itsteeth maybe driven into said log, if desired, the handle being presseddownward, and the lower dog h is raised by the screw W, as abovedescribed, until said lower dog enters the lower side of the log. Theouter teeth 71 h of each dog are longer than the inner teeth 72, 71. ofthe same to adapt said dogs to the curvature of the log.

The feed-bar H is provided, at each end thereof,w1th a fixed dog j 3''adapted to be engaged by the teeth of a feed-rackj j held over said dogby a guide j j, in which said rack is capable of a vertical movement,said rack near its rear end being pivoted, at j f, to a radial arm j jof the rock-shaft J. The rock-shaft J is journaled in the transverserails of the carriage D and between the ends of said rock-shaft isprovided with a rearwardly-extending arm 7' carrying an antifrictionroll j", adapted to run up on eitherof two inclines K K, similar to eachother except that they are inclined in opposite directions, each inclinedescending toward the other and toward the shaft E. When the arm j israised by either incline the racks 7' j are pushed forward, carrying thedogs jj' and the feed-bar H forward and therefore carrying the post hand log I forward and this forward movement takes place just after thecarriage D passes the saws M M in either direction and pushes the logsforward far enough to be cut by the saws when the motion of the carriageis reversed. A stop, represented as a rail or bar d extending from endto end of the carriage and secured to the undersides of the rear ends ofthe end rails below said'arm prevents said arm from falling below saidinclines. The arm 7' is brought down'to said stop by its own gravity orby a spring which may be a spiral spring 7' surrounding said rock-shaftJ and attached at one end to said army and at the other to one of thetrans- IIO verse rails or other fixed part of the carriage D. Othertransverse-racks L L are stationary on the carriage and are engaged byretaining pawls Z Z pivoted on the feed-bar H and said last-named racksand retainingpawls normally prevent a backward movement of the carriageor movement away from the cutting plane of the saws, the teeth of thefeed-racks and retaining-racks all pointing forward. When the carriagehas reached the limit of its forward movement, the racks fij? are raisedout of engagement with the dogs 3' j by means of the cam-shaft J,journaled in the transverse-bars of the carriage and hav ing cams j j,fast thereon, and having a radial arm f secured thereto, which arm 7'being turned over forward causes said cams to press upon said racks inthe rear of their pivots in the arms j j and raises the toothed frontportions of said racks. The pawls Z Z are raised out of engagement withthe racks L L by means of a shaft Z journaled at Z Z on the feed-bar Hand having radial arms I Z which reach under said pawls Z Z and raisethem when said shaft Z is raised by turning forward the radial arm Zsecured to said shaft Z \Vhen all the racks 7' 7' L L are out ofengagement with their respective dogs or pawls, the feed-bar H may bedrawn back: ward by turning the hand-wheel n fast on the shaft N andcausing the wheels 'n n also fast on said shaft N to wind up the strapsn n each of said straps being secured at one end to said feed-bar and atthe other end to one of said wheels at n. The carriage D is thenreloaded and all the racks arebrought into engagement with their dogs orpawls by drawing backward the upper ends of the arms 7' Z and thecarriage is started by setting the driving pulley f in operation. Thetrack however may be made long enough to support a second carriage (notshown, but a duplicate of the carriage D) with its traverse rack 6 outof engagement with the pinion e and far enough away from said pinion notto be in the way of the first carriage and by making the incline Kdouble, that is sloping said incline in both directions or adding to itthe opposite incline K the second carriage may be run (to the left inFigs. 1 and 5) past said inclines K and K until the traverserack e ofsaid second carriage engages the pinion e, care being taken, however, toremove the reversing-stud d from the arm 01 before said stud comes incontact with the arm 9 to allow the rack e of the first carriage orcarriage moving to the left to run so far as to get out of engagementwith the pinion. Of course, in like manner the incline K may be made toslope in both directions for the same purpose and a stationary carriageat either end of the track may be filled while another carriage loadedwith logs is traversing and gradually becoming emptied, to cause aslittle delay as possible in submitting a new load of logs to the actionof the saws after the sawing of a previous load is completed.

The traverse of the carriage carries the logs 1 past the band-saws M Mwhich are of the usual construction and operation except that, in themachine herein described, two bandsaws are used, their descendingmembers arranged in the same vertical plane with their backs toward eachother, so that as the carriage D passes said saws in either direction acut is made, the logs being set over at or near each end of the traversefor a new cut, as above described. The lower band-wheels m m of theband-saws M M are secured on the same shaft m with each other and withthe fast pulley m a belt (not shown) on which fast pulley drives saidshaft m which is journaled in suitable boxes m m at right angles withthe shaft E, said saws being at equal distances from the front end ofsaid shaft E. The upper wheels (not shown) of the bandsaws'areseparately adjustable in the usual manner. A suitable hopper 0, having aflaring upper end 0 is arranged between the wheels m m in the rear ofthe pulley m and receives the blocks cut from the logs I and may conductsuch blocks into a lower room or on to an endless conveying belt of'ordinary construction, which deposits the blocks in any convenientplace.

The machine above described may be used not only for cutting logs intoblocks of a suitable size to be placed in the boiler or converter, usedin the process of making paperpulp, but for cutting such blocksfor anypurpose, as blanks for spools and numerous other articles.

I claim as my invention- 1. The combination of the carriage, thefeedbar, adapted to slide thereon, dogs, fixed on said feed-bar, arock-shaft, provided with arms, racks, pivoted to said arms and eng'aging said dogs, another shaft, journaled on said carriage, Wheels, faston said last-named shaft, and straps or flexible connections, eachattached at one end to said feed-bar and at the other end to one of saidwheels, as and for the purpose specified.

2. The combination of the carriage, the feedbar, adapted to slidethereon, dogs, fixed. on said feed-bar, a rock-shaft, provided witharms, racks, pivoted to said arms and engaging said dogs, a cam-shaft,provided with cams and adapted to be turned to press said cams againstsaid racks and throw said racks out of engagement with said dogs,another shaft, journaled on said carriage, wheels, fast on saidlast-named shaft, and straps or flexible connections, each attached atone end to said feed-bar and at the other end to one of said wheels, asand for the purpose specified.

3. The combination of the carriage, the feedbar, adapted to slidethereon,'dogs, fixed. on said feed-bar, a rock-shaft, provided witharms, feed-racks, pivoted to said arms and engaging said dogs, acam-shaft, provided with cams and adapted to be turned to press saidcams against said feed-racks and throw said feed-racks out of engagementwith said dogs, retaining racks, fast on said carriage, dogs, pivoted onsaid feed-bar and engaging said retaining-racks, a releasing-shaft,having radial arms and adapted to be turned to disengage said dogs fromsaid retaining-racks, another shaft, journaled on said carriage, wheels,fast on said last-named shaft, and straps or flexible connections, eachattached at one end to said feedbar and at the other end to one of saidwheels, as and for the purpose specified.

4. The combination of the carriage, a

trough, secured on said carriage and having a longitudinal opening orspace between the sides thereof, at the bottom thereof, a feedbar,adapted to slide on said carriage below said trough, and dogs, securedto said feedbar, and arranged within said trough, as and for the purposespecified.

5. The combination of the carriage, a trough, secured on said carriageand having a longitudinal opening or space between the sides thereof, atthe bottom thereof, a feedbar, adapted to slide on said carriage belowsaid trough, a dog-post, secured to said feedbar between the sides ofsaid trough and provided with a slot, dogs, adjustable on said post, oneof said dogs being movable in said slot, a screw, to draw said lastnamed dog toward the other of said dogs, to seize and hold a logarranged in said trough, as and for the purpose specified.

6. The combination of the carriage, a trough, secured on said carriageand having a longitudinal opening or space between the sides thereof, atthe bottom thereof, a feedbar, adapted to slide on said carriage belowsaid trough, a dog-post, secured to said feedbar between the sides ofsaid trough and provided with a slot, dogs, adjustable on said post, oneof said dogs being movable in said slot, a screw, to draw saidlast-named dog toward the other of said dogs, to seize and hold a logarranged in said trough, said screw being provided with a crank orhandle, and a fork or holder, adapted to engage said crank or handle, toprevent the movement of said. screw, as and for the purpose specified.

7. The combination of two saws, arranged to cut in opposite directionsin the same plane, a feed-carriage, having a reciprocating movement pastsaid saws in a direction parallel with the cutting-plane of said saws, afeedbar, adapted to slide on said carriage, dogs, fixed on saidfeed-bar, a rock-shaft,journaled in said carriage and provided witharms, racks, pivoted to said arms and engaging said dogs, and stationaryinclines, each adapted, in the movement of said carriage, to raiseanother arm, with which said rock-shaft is provided, and thereby to movesaid racks and feed-bar after each movement of said carriage past saidsaws in either direction, as and for the purpose specified.

In witness whereof I have signed this specification,in the presence oftwo attesting witnesses, this 31st day of July, 1891.

WILLIAM D, HOPKINS.

Witnesses:

ALBERT M. MOORE, lVIYRTIE C. BEALs.

